Go

DNS Query MX Records

See more DNS Examples

Shows how to perform a DNS query to retrieve MX records.

Note: This example requires Chilkat v9.5.0.96 or later.

Go

    success := false

    dns := chilkat.NewDns()

    json := chilkat.NewJsonObject()
    json.SetEmitCompact(false)

    success = dns.Query("MX","somebody@gmail.com",json)
    if success == false {
        fmt.Println(dns.LastErrorText())
        dns.DisposeDns()
        json.DisposeJsonObject()
        return
    }

    fmt.Println(*json.Emit())

    // Sample response.
    // Parsing code below..

    // -------------------------------------------------------------------------------
    // Note: Chilkat will return the results sorted by "pref" from lowest to highest.
    // -------------------------------------------------------------------------------

    // {
    //   "answer": {
    //     "mx": [
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 5,
    //         "domain": "gmail-smtp-in.l.google.com"
    //       },
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 10,
    //         "domain": "alt1.gmail-smtp-in.l.google.com"
    //       },
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 20,
    //         "domain": "alt2.gmail-smtp-in.l.google.com"
    //       },
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 30,
    //         "domain": "alt3.gmail-smtp-in.l.google.com"
    //       },
    //       {
    //         "name": "gmail.com",
    //         "ttl": 491,
    //         "pref": 40,
    //         "domain": "alt4.gmail-smtp-in.l.google.com"
    //       }
    //     ]
    //   }
    // }

    // Use this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON

    var name *string = new(string)
    var ttl int
    var pref int
    var domain *string = new(string)

    i := 0
    count_i := json.SizeOfArray("answer.mx")
    for i < count_i {
        json.SetI(i)
        name = json.StringOf("answer.mx[i].name")
        ttl = json.IntOf("answer.mx[i].ttl")
        pref = json.IntOf("answer.mx[i].pref")
        domain = json.StringOf("answer.mx[i].domain")
        i = i + 1
    }


    dns.DisposeDns()
    json.DisposeJsonObject()